A little update. After a week of antibiotics Mavis is brighter in herself but the swelling under her neck has not reduced. So I am expecting that she will need to have an ultrasound. Also, she still has very soft poops but I'm expecting that it is the antibiotics causing this.
She is such a a sweetheart and takes all her meds without complaint. Although she is getting a bit fed up of the constant bum baths and has a good grumble at me.
I am very sorry that the swelling hasn't gone down but that she is otherwise coping.